What mathematical relationship does Ohm's Law represent?

Ohm's Law represents the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. The correct expression of this law is the equation V = IR, which indicates that the voltage across a conductor is equal to the current flowing through it multiplied by the resistance of that conductor.

In the context of the question, while resistance (R) can be calculated using the formula R = V/I, which is derived from rearranging the equation V = IR, the primary representation of Ohm's Law is indeed the relationship V = IR. This relationship indicates how current changes in response to varying voltage and resistance, providing a foundational principle in the study of electrical circuits.

The alternative equations relate to power (P = IV) or other specific applications of the law but do not directly represent Ohm's Law itself. Thus, understanding V = IR is crucial for grasping the fundamental behavior of electrical circuits.